<!DOCTYPE html>
<html>
<head>
<title>DTLS fingerprint validation</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../RTCPeerConnection-helper.js"></script>
</head>
<body>
<script>

function makeZeroFingerprint(algorithm) {
  const length = algorithm === 'sha-1' ? 160 : parseInt(algorithm.split('-')[1], 10);
  let zeros = [];
  for (let i = 0; i < length; i += 8) {
    zeros.push('00');
  }
  return 'a=fingerprint:' + algorithm + ' ' + zeros.join(':');
}

// Tests that an invalid fingerprint leads to a connectionState 'failed'.
promise_test(async t => {
  const pc1 = new RTCPeerConnection();
  t.add_cleanup(() => pc1.close());
  const pc2 = new RTCPeerConnection();
  t.add_cleanup(() => pc2.close());
  pc1.createDataChannel('datachannel');
  exchangeIceCandidates(pc1, pc2);
  await pc1.setLocalDescription();
  await pc2.setRemoteDescription(pc1.localDescription);
  const answer = await pc2.createAnswer();
  await pc1.setRemoteDescription({
    type: answer.type,
    sdp: answer.sdp.replace(/a=fingerprint:sha-256 .*/g, makeZeroFingerprint('sha-256')),
  });
  await pc2.setLocalDescription(answer);

  await waitForConnectionStateChange(pc1, ['failed']);
  await waitForConnectionStateChange(pc2, ['failed']);
}, 'Connection fails if one side provides a wrong DTLS fingerprint');

['sha-1', 'sha-256', 'sha-384', 'sha-512'].forEach(hashFunc => {
  promise_test(async t => {
    const pc1 = new RTCPeerConnection();
    t.add_cleanup(() => pc1.close());
    const pc2 = new RTCPeerConnection();
    t.add_cleanup(() => pc2.close());
    pc1.createDataChannel('datachannel');

    await pc1.setLocalDescription();
    await pc2.setRemoteDescription(pc1.localDescription);
    const answer = await pc2.createAnswer();
    await pc1.setRemoteDescription({
      type: answer.type,
      sdp: answer.sdp.replace(/a=fingerprint:sha-256 .*/g, makeZeroFingerprint(hashFunc)),
    });
    await pc2.setLocalDescription(answer);
  }, 'SDP negotiation with a ' + hashFunc + ' fingerprint succeds');
});

</script>
</body>
</html>
